TT#9717 Added dependency for debian package "netfilter-persistent"

NGCP iptables templates need debian package "netfilter-persistent"
(formerly "iptables-persistent") installed.

Additionally package "iptables-persistent" has to be installed. This
package is now just providing iptables command line tools while the
service in init.d was moved to "netfilter-persistent". Package
"netfilter-persistent" alone will not load any rules, since it is
depending on the command line tools.

Removing package "netfilter-persistent" from dependency list. Package
"iptables-persistent" depends already on it.

Change-Id: I205a6d82f1f042d9cae2404893a45157a97b3471

debian/control

@@ -255,6 +255,7 @@ Depends:
  haproxy,
  heartbeat-2 (>= 2.1.3-7~sipwise2) | heartbeat (>= 1:3.0.5+hg12629-1~),
  influxdb-relay,
+ iptables-persistent,
  kannel,
  kibana,
  ldap-utils,
@@ -328,6 +329,7 @@ Architecture: all
 Depends:
  bsd-mailx | mailx,
  bzip2,
+ iptables-persistent,
  kannel,
  mariadb-client,
  mariadb-server,
@@ -391,6 +393,7 @@ Depends:
  haproxy,
  heartbeat-2 (>= 2.1.3-7~sipwise2) | heartbeat (>= 1:3.0.5+hg12629-1~),
  influxdb-relay,
+ iptables-persistent,
  kannel,
  kibana,
  ldap-utils,